Brake-shoe.



J. T. PERKINS. BRAKE SHOE.

APPLICATION FILED DEC. 1o, 1910.

l01'7,015 Patnted Feb. 13, 1912 lllhlltylll@ PATENT FFRCE.

JAMES T. PERKINS, OF CEDARTOWN, GEORGIA, ASSIGNOR OF ONE-HALF TOWILLAIVI R. G-OLSAN, OF CEDARTOWN, GEORGIA.

:BRAKE-SHOE.

Specicaton of Letters E'atent.

Patented Feb. 13, 1912.

Application filed -December 101910. Serial No. 596,689

To all whom "it may concern."

Be it known that l', JAMES T. PERKINS, a citizen of the United States,residing at Cedartown, in the county of Pol k and ,State ol" Georgia,have invented a new and useful Brake-Shoe, of which the following is aspecification.

It is the object of the present invention to provide an im provedbrakeshoe designed chiefly for use on locomotives, railway coaches, freightcars, street cars, and the like.

One aim of the present invention is to provide a brake shoe having, inits wheel contacting` tace', pockets to receive and contain a lubricantto be applied to the wheel flange and thereby prevent` to a consider'-able degree, wear ot the flange and rail, when traveling against therail, and t'o prevent the flange 4climbing the rail thereby causingderailment ot the car orA locomotive. ln this connection, the invention`contemplates' forming the brake shoe with pockets having a constrictedmouth, the pockets being packed or filled with a normally hard lubricantadapted to spread onto the wheel flange through contact ot the shoe withthe wheel as the metal of shoe wears away.

ln the accompanying drawing Figure l is a perspective view of a brakeshoe constructed in accordance with the present invention. Fig. 2 is atransverse sectional view through the shoe and a portion ot the wheelwith which it cooperates. Fig. 3 is a longitudinal sectional viewthrough a portion of the shoe, on the line 3 3 of Fig. 2 looking in thedirection indicated by the arrow. j

In the drawings and particularly in Fig. 2 thereof there is shown aportion of a wheel. indicated by the reference character W. The wheeltread is shown at 4 and the flange of the wheel is indicated bythereference' numeral 5. The brake shoe is illustrated as comprising a body6 formed with the usual lug 7 to which is attached the brake beam foroperating the brake shoe. The body 6 of the brake shoe has the usualworking face 3 and is formed at one side edge with a flange 8 having afaee-9 which is of ogee form and is designed to bear against .the

face of the flange of the wheel. This flange 8 of the brake shoe isformed in its face which contacts with the flange of the wheel,

with pockets 10 which are enlarged inwardly or in other words haveconstricted mouths 1l. The mouth 11 of each pocket extends transverselyacross the said contacting tace of the flange S and these pockets arearranged one abovethe other throughout the height of, the shoe asillustrated' in F ig. l of the drawing. lt will be observed that thepockets are of greater leiigth at their bottom than at 'theirconstricted mouths and that also they are of greater width at theirbottoms than-at their mouths.

ln using the brake shoe embodying the present invention and abovespecilically described, a normally hard lubricant is packed lintel thepockets until they are lilled. rlhe shoe then mounted in the usualmanner and its faceV 3 contacts with the tread Il or peripheral surfaceof the wheel while 'the 'inclined face i) of the flange 8 contacts withthe inner face ot they flange 5 of the wheel. llowever, it will be notedthat the Contact ot the main part of the brake shoe'with the tread ofthe wheel is direct, whereas when the. shoe is moved. in a direction tobring about this positive or direct Contact, the

flange S moves in Aa direction which is' oblique to the contact betweenits surface 9 and the inner edge oi the lange 5 of the wheel. 'This willresult in the application or pressure to the tread of the wheel but onlythe production of a Contact between the flanges of the brake shoe andthe wheel. lt will be obvious that if the line of Contact between thetwo `flanges included those points wheiie friction occurs during brakingaction, the material of the brake shoe between the mouths ll would berapidly worn away. The contact of the wheel liange with the -lange ofthe brake shoe will serve to lubricate the wheel ange as the metal ofthe shoe wears away, the lubricantcoming in contact with the wheelflange only as ,this is done.

" What claimed is:

A brake shoe having a smooth imperferate working face and a flange alongone" side of the shoe. said flange having a curved work ing-face adaptedto contact with the flange ico of a wheel and having a plurality of non`In testimony that claim the foregoing communicating lubricant holdingpockets as my Own, I have hereto aiXed my signaeXtending inwardly fromsaid curved face ture in the presence of two witnesses.

and adapted to be closed by the wheel flange, JAMES T. PERKINS. all ofthe Walls of each pocket converging Witnesses: inwardly along straightlines from the W. A. CALHOUN,

curved open end of the pocket. J. E. DEMPSEY.

